By Mine Safety Appliances Co. Ltd. Classic black rubber mask with a fibreglass 'exo-skeleton' and horse-shoe clamp harness. The rubber is in very good flexible condition. Good exo-skeleton and harness. Fitted with a type 54 microphone/loom and a very good corrugated rubber oxygen tube with bayonet alloy connector (6D/2053). A really good example. Stock code O23077.